MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1059.005 Visual Basic
T1566.001 Phishing: Spearphishing Attachment
The sample is an RTF document containing OLE object data, specifically targeting the Equation Editor vulnerability. The presence of \objupdate indicates an attempt to force OLE activation, a common technique for exploiting embedded objects. The document body contains a lure instructing the user to 'Enable editing', which is a typical social engineering tactic to bypass security measures and facilitate the execution of malicious code.
Heuristics 4
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Split hex Equation Editor ProgID + OLE object critical RTF_EQUATION_EDITORRTF embeds the Equation.3 ProgID as hex bytes near OLE object activation and splits the byte stream with whitespace or an ignorable RTF group. This is an Equation Editor OLE activation surface commonly used by CVE-2017-11882 / CVE-2018-0802 exploit documents.
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\objupdate forces OLE activation high RTF_OBJUPDATERTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
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OLE object data medium RTF_OBJDATARTF contains 1 \objdata section(s) — embedded OLE objects
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Macro/content-enable lure medium SE_ENABLE_LUREDocument instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off0000208c.binced5655c0d95d3339471519459f661730b70d0154a7af0c1ec35200edba94149 |
rtf-objdata-decoded | RTF \objdata at offset 0x208C | 1819 bytes |
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